package dao;

import proxy.GeneralDao;

public class BookDaoImpl {

    public int insert(){
        System.out.println("----insert book");
        //throw new NullPointerException();
        return 1;

        //方法执行完成在return后面。
    }

    public void delete() {
        System.out.println("----delete book");
    }

    public void update(){

        System.out.println("----update book");

    }


}
